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TWO  SERENDRA   FINDINGS

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On   31  May   2013,   at   approximately   7:59   p.m.,   an   explosion   took  place  in  Unit  501-­‐‑B,  Section  B,  Tower  A,  Two  Serendra,  McKinley  Parkway  Drive,  Bonifacio  Global  City  (BGC),  Taguig  City.   2

Photo  Source:  Robin  Leonard

INVESTIGATION  OF    IATF-­‐‑COMPOSITE  TEAM

A.  IATF B.  NBI  –  Electrical  Division C.  DOST

D.  DOH E.  DPWH

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 Kroll  Adv

isory  

Solutio

ns

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Mr.  James  William  Munday Experiences • Fire,  Gas,  &  Vapor  explosion  scene  examinations

• Scene  examinations  of  est.  1,600  incidents

Credentials • Metropolitan  Police  Forensic  Science  Laboratory  (Scotland  Yard)  

• Institution  of  Fire  Engineers • International  Association  of  Arson  Investigators

• Forensic  Science  Society • Diploma:  Forensic  Science  Society  in  Fire  Investigation

• Certified:  Fire  investigator

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A.  Unauthorized*  Movement  of  Gas  Range  Caused  

a  Detachment  of  the  Gas  Supply  Hose

Loose  Clamp Paint  drip  showing  hose  was  lying  on  the  floor.

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*not  in  scope  of  works  approved  by  Serendra

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9  inches

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B1.  Non-­‐‑functional  safety  devices

Automatic  Shut-­‐‑off  Valve: Electrically  connected  to  the  detector A  “normal-­‐‑on”  or  “fail-­‐‑open”  design.

Gas  Leak  Detector: Unplugged  OR  the  branch  circuit  for  convenience  outlets  was  turned  off.

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B2.  Only  one  gas  leak  detector  for  the  whole  building.  Lone  building  gas  detector  in  Tower  B  did  not  activate.

C.  Unauthorized  Access  to  Gas  

Valve

On  May  31,  at  around  6:30  a.m.,  the   gas   valve   was   opened  without   the   assistance   of   an  authorized  person.

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(DOH  Final  Technical  Report  dated  02  August  2013  )  

PID  reading  for  ethyl  mercaptan   0.000000011  ppm Odor  threshold   0.0000087  ppm   LOA  (Level  of  Distinct  Odor  Awareness)   0.00014  ppm

Vaporization  of  ethyl  mercaptan  in  LPG  was  lost  at  the  vaporization  stage  and  made  it  below  detectable  levels  (Kroll  and  BFP).

D.  Lack  of  technical  competence  of  gas  supplier  in  handling  odorant

E.  Negligence:    “Bahala  na,  Okay  lang”  ajitude  

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•  Not  obtaining  all  permits  for  renovation •  Allowing  occupancy  after  renovation  without  

inspection  by  Two  Serendra •  Unauthorized  access  to  gas  valve •  Inadequate  /  non-­‐‑functional  safety  devices

Possible  Responsibility/  Liability  of  Parties

1.  Owners  &  caretakers

A. Unauthorized  Movement  of  Gas  Range  Caused  a  Detachment  of  the  Gas  Supply  Hose.

B1.  Non-­‐‑functional  safety  devices C.  Unauthorized  Access  to  Gas  

Valve E.  Negligence:    

“Bahala  na,  Okay  lang”  ajitude  /  Not  obtaining  all  Permits

•  Owner  of  Unit  501-­‐‑B

•  Unauthorized  Person  who  opened  gas  valve

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Possible  Responsibility/  Liability  of  Parties

2.  RM  Ladrido  Construction  Services: Proprietor,  Supervisor,  Foreman,  Plumber,  Painter

A. Unauthorized  Movement  of  Gas  Range  Caused  a  Detachment  of  the  Gas  Supply  Hose.

E.  Negligence:    “Bahala  na,  Okay  lang”  ajitude  /  Not  obtaining  all  permits

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Possible  Responsibility/  Liability  of  Parties

3.      Two  Serendra,  Inc.   B1.  &  B2.   Inadequate  /  Non-­‐‑functional  safety  devices

C.  (Allowing)  Unauthorized  Access  to  Gas  Valve

E.  Negligence:    “Bahala  na,  Okay  lang”  ajitude  

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Possible  Responsibility/  Liability  of  Parties

4.      Bonifacio  Gas  Corporation

D.  Lack  of  technical  competence  of  gas  supplier  in  handling  odorant

E.  Negligence:    

“Bahala  na,  Okay  lang”  ajitude  

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Possible  Responsibility/  Liability  of  Parties

5.      Makati  Development  Corporation

B1.  Non-­‐‑functional  safety  devices B2.  Only  one  gas  leak  detector  for  

the  whole  building.  Lone  building  gas  detector  in  Tower  B  did  not  activate.  

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Submission  of  report

The  Department  of  Justice  to  make  evaluations  insofar  as  the  liability  of  the  persons  implicated  in  the  

explosion  are  concerned Source:  IATF  Report

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TWO  SERENDRA   FINDINGS

DILG 19